Anyway, I always thought Borg drones were armed, but just never wanted to use their weapons on perfectly good raw materials which they could assimilate. I'm pretty sure Seven of Nine has an arm mounted weapon when she and the other drones first beam aboard Voyager, in the scene when Chakotay and the security team enter the cargo bay, she has her arm raised at them with what looks like one of those Borg arm weapons attached to her upper forearm: